effortless

adjectives

requiring or apparently requiring no effort
"the swallows glided in an effortless way through the busy air"
is derived from
antonym
is similar to
performing adroitly and without effort
"a facile hand"
is similar to
not resulting from undue effort; not forced
"a voice with a pleasingly unforced quality"; "his playing is facile and unstrained"
see also
posing no difficulty; requiring little effort
"an easy job"; "an easy problem"; "an easy victory"; "the house is easy to heat"; "satisfied with easy answers"; "took the easy way out of his dilemma"
not showing effort or strain
"a difficult feat performed with casual mastery"; "careless grace"
is derived from